US4826791A - Silicon carbide-alpha prime sialon beta prime sialon - Google Patents

Silicon carbide-alpha prime sialon beta prime sialon Download PDF

Info

Publication number
US4826791A
US4826791A US07/056,096 US5609687A US4826791A US 4826791 A US4826791 A US 4826791A US 5609687 A US5609687 A US 5609687A US 4826791 A US4826791 A US 4826791A
Authority
US
United States
Prior art keywords
sialon
ceramic composite
ceramic
sic
sic particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/056,096
Other languages
English (en)
Inventor
Pankaj K. Mehrotra
Klaus-Markus Peters
Joyce L. Swiokla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kennametal PC Inc
Original Assignee
Kennametal Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22002121&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US4826791(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Assigned to KENNAMETAL INC. reassignment KENNAMETAL INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SWIOKLA, JOYCE L.
Priority to US07/056,096 priority Critical patent/US4826791A/en
Assigned to KENNAMETAL INC. reassignment KENNAMETAL INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MEHROTRA, PANKAJ K.
Application filed by Kennametal Inc filed Critical Kennametal Inc
Priority to AU17966/88A priority patent/AU1796688A/en
Priority to PCT/US1988/001454 priority patent/WO1988009313A1/fr
Priority to DE198888904830T priority patent/DE346399T1/de
Priority to DE3877566T priority patent/DE3877566T2/de
Priority to EP88904830A priority patent/EP0346399B2/fr
Priority to CA000567533A priority patent/CA1298321C/fr
Publication of US4826791A publication Critical patent/US4826791A/en
Application granted granted Critical
Assigned to KENNAMETAL PC INC. reassignment KENNAMETAL PC INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KENNAMETAL INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/597—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon oxynitride, e.g. SIALONS

Definitions

  • Prior art commercial SiC components such as seal rings, nozzles and bearings, while having high room temperature hardness, high abrasion resistance and high thermal conductivity, have poor fracture toughness, making them unsuitable for, or reducing their lifetime in, many applications where impact may occur.
  • the range of useful applications of SiC components is further limited by the fabrication methods which are used to fabricate dense SiC articles. Fabrication of commercial SiC articles is performed by (1) hot pressing, which is a method that is usually only economical for relatively simple final component shapes; (2) sintering which, while allowing more complex shapes to be made, is also very costly due to the high temperatures (2000°-2300° C.) required to densify SiC; and (3) reaction bonding which, while capable of producing complex shapes, has inferior properties due to the presence of free silicon.
  • Alpha prime-beta prime sialons are described in U.S. Pat. Nos. 4,563,433 and 4,547,470, and are exemplified by the commercial prior art composition, KYON 2000, which contains about 5 to 40 w/o (weight percent) alpha prime sialon, with the remainder being essentially beta prime sialon, except for minor phases which are mainly a result of sintering aid residues.
  • KYON is a trademark of Kennametal Inc. for its ceramic compositions and articles.
  • Beta prime sialon has the formula Si 6-z Al z O z N 8-z , where O ⁇ z ⁇ 5.
  • Alpha prime sialon has the formula (Si,Al) 12 M x (O,N) 16 , where M is a sintering aid metal.
  • a ceramic composite composition of very fine (1 micron or less average size) SiC particles in a beta prime sialon ceramic matrix is referred to in Richerson U.S. Pat. No. 3,890,250.
  • SiC particles may be dispersed in an alpha prime/beta prime sialon matrix containing about 10 to about 67 w/o alpha prime sialon to provide improved hardness without having a significantly adverse affect on the fracture toughness of the material.
  • the composite according to the present invention also has other properties, such as thermal conductivity, Young's modulus, abrasion resistance, thermal expansion coefficient which are increased compared with alpha prime-beta prime sialon.
  • the present composite containing less than about 30 v/o SiC particles
  • a ceramic composite containing 5 to 50 v/o SiC particles dispersed in a ceramic matrix.
  • the SiC particles have a median size between about 1.5 to 15 microns, and preferably 2 to 9 microns.
  • the ceramic matrix is essentially sialon.
  • the sialon contains at least 10 w/o, and preferably, where high hardness and high toughness are desired, at least 50 w/o, alpha prime sialon, with the remainder being essentially beta prime sialon.
  • the composite has a density of at least 3.1 g/cc, and preferably at least 3.15 g/cc.
  • the alpha prime solution phase forms at least 60 w/o of the sialon in the ceramic matrix.
  • alpha prime contents 10 to 50 w/o may be preferred.
  • FIG. 1 is a photomicrograph (500 ⁇ ) of an as polished section through a ceramic composite in accordance with the present invention.
  • FIG. 3 shows Rockwell A hardness of sintered and HIPped composites as a function of the ratio of alpha prime/beta prime sialon.
  • FIG. 4 shows Rockwell A hardness as a function of the SiC content of the composite.
  • FIG. 7 shows a longitudinal cross section through an annular seal ring in accordance with the present invention.
  • SiC particles may be dispersed in a ceramic matrix containing alpha prime sialon to provide a ceramic composite that has high fracture toughness, high hardness and other enhanced properties.
  • SiC particle size it has been found necessary to control the SiC particle size, the level of SiC in the ceramic composite, the amount of alpha prime sialon in the matrix, as well as the density of the final material.
  • the level of SiC in the composite should be at least 5 v/o in order to obtain a minimal improvement in hardness.
  • the hardness of the ceramic composite can be significantly improved (over that of commercial alpha prime-beta prime sialon-RA (Rockwell A) about 93.6) and may even approach that of commercial SiC (about 95 to 96 RA).
  • SiC content should preferably not be increased beyond about 30 v/o. We believe that further increases in SiC content, while improving thermal and electrical conductivity, making it more readily electrodischarge machinable, will be accompanied by a reduction in sinterability (decreased densification) and toughness of the material.
  • one or more minor phases are normally present in amounts of 0.1 to 10 w/o.
  • These minor phases are typically intergranular and include a glassy or crystalline phase.
  • yttria is used as the sintering aid, these minor phases may include YAG, N-YAM, Y-N-alpha-Wollastonite, B-phase, N-apatite and N-melilite.
  • the ceramic composite is more difficult to densify during sintering, but we have also found that if too much minor phase is present, there will be a reduction in the useful properties of the ceramic composite. While not wishing to be bound by theory, we have theorized that the amount of minor phase present should be controlled within the foregoing range to form a very thin intergranular phase at least substantially encircling the SiC particles, and which we believe separates the SiC from the sialon. Therefore, for optimum results, we theorize that the amount of minor phase(s) desired is dependent upon the volume percent of SiC as well as the size of the SiC particles.
  • the median size of the SiC particles it is, therefore, preferable to control the median size of the SiC particles to within the range of 1.5 to 15 microns.
  • the average SiC particle size should be at least 1.5 microns.
  • the upper limit of about 15 microns is believed to be necessary to assure an optimum hardening affect for a given volume of SiC particles. More preferably, the median size of the SiC particles should be between 2 and 9 microns.
  • the level of alpha prime sialon in the sialon of the ceramic matrix is 10 to 67 w/o of the sialon present, with 33 to 90 w/o beta prime forming the remainder, of the sialon.
  • the alpha prime content of the sialon should be at least 50 w/o, and more preferably, at least 60 w/o.
  • Table I provides a listing of the compositions evaluated in Examples 1-5 which follow.
  • the ceramic matrix powder mix utilized was: 83.8 w/o Si 3 N 4 -5.7 w/o AlN-3.9 w/o Al 2 O 3 -6.6 w/o Y 2 O 3 .
  • the ceramic matrix powder mix utilized was: 85.5 w/o Si 3 N 4 -5.8 w/o AlN-4.0 w/o Al 2 O 3 -4.7 w/o Y 2 O 3 .
  • the SiC starting powders were obtained from Lonza Ltd., Inorganic Chemical Division, CH-4002 Basel, Switzerland.
  • the ceramic matrix powder mixture was premilled to obtain a median particle size of about 0.7 micron.
  • the final powder blend for each mix (1 to 4) was then made by adding the necessary amount of SiC powder to the required weight of premilled ceramic matrix powder to produce 400 gm batches. These powders were then blended for 24 hours in a mill jar using 2 kilograms of sialon cycloids and 1 liter of isopropanol solvent. After blending, the powder was dried and then screened through a 40 mesh sieve. Green samples formed by cold isostatic pressing were subsequently sintered using conventional sialon sintering techniques at 1750° to 1850° C. for 1 hour under 1 atmosphere nitrogen.
  • FIG. 1 A typical as polished microstructure of a composite made in accordance with the present invention is shown in FIG. 1.
  • 25 v/o of substantially equiaxed SiC particles having a median size of 5.5 microns, are dispersed in a ceramic matrix (dark material) containing alpha prime sialon, beta prime sialon and minor phases due to sintering aid residues.
  • Mixes 5-11 were processed in a manner similar to that detailed for Mixes 1-4, except that densification was achieved by hot pressing at a pressure of 5000 psi applied for about one-fourth hour at 1850° C.
  • the material in accordance with the present invention may be utilized in those applications requiring both high wear resistance and high fracture resistance. It is specifically contemplated that the present invention can be utilized to make bearings and components for fluid handling systems such as nozzles and seal rings. Examples of conventional nozzle 60 and seal ring 70 geometries which may be made from the present composite are illustrated in FIGS. 6 and 7, respectively. In conjunction with the seal ring shown, it may be preferable to keep the alpha prime content within 10 to 50 w/o for optimum thermal conductivity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)
US07/056,096 1987-05-29 1987-05-29 Silicon carbide-alpha prime sialon beta prime sialon Expired - Lifetime US4826791A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US07/056,096 US4826791A (en) 1987-05-29 1987-05-29 Silicon carbide-alpha prime sialon beta prime sialon
EP88904830A EP0346399B2 (fr) 1987-05-29 1988-05-03 Materiau ceramique composite et article ceramique produit
AU17966/88A AU1796688A (en) 1987-05-29 1988-05-03 Silicon carbide-alpha prime sialon
DE3877566T DE3877566T2 (de) 1987-05-29 1988-05-03 Keramisches verbundmaterial und daraus hergestellte gegenstaende.
PCT/US1988/001454 WO1988009313A1 (fr) 1987-05-29 1988-05-03 Carbure de silicium-sialon alpha prime
DE198888904830T DE346399T1 (de) 1987-05-29 1988-05-03 Werkstoff, bestehend aus alpha-tialon als grundstoff und aus siliciumkarbid.
CA000567533A CA1298321C (fr) 1987-05-29 1988-05-24 Carbure de silicium avec base d'alpha-sialon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/056,096 US4826791A (en) 1987-05-29 1987-05-29 Silicon carbide-alpha prime sialon beta prime sialon

Publications (1)

Publication Number Publication Date
US4826791A true US4826791A (en) 1989-05-02

Family

ID=22002121

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/056,096 Expired - Lifetime US4826791A (en) 1987-05-29 1987-05-29 Silicon carbide-alpha prime sialon beta prime sialon

Country Status (6)

Country Link
US (1) US4826791A (fr)
EP (1) EP0346399B2 (fr)
AU (1) AU1796688A (fr)
CA (1) CA1298321C (fr)
DE (2) DE346399T1 (fr)
WO (1) WO1988009313A1 (fr)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987104A (en) * 1986-03-14 1991-01-22 Commonwealth Scientific & Industrial Research Organization Method of forming a ceramic product
US5122485A (en) * 1990-01-29 1992-06-16 Nissan Motor Co., Ltd. Sintered silicon carbide and silicon nitride base composite
US5196386A (en) * 1989-09-18 1993-03-23 The Tokyo Electric Power Company, Incorporated Sintered ceramic composite body and method of manufacturing same
US5198165A (en) * 1990-06-19 1993-03-30 Nissan Motor Co., Ltd. Sintered silicon carbide and sialon composite
US5217932A (en) * 1989-09-18 1993-06-08 The Tokyo Electric Power Co., Ltd. Sintered ceramic composite body and method of manufacturing same
US5238885A (en) * 1990-09-25 1993-08-24 Kabushiki Kaisha Toshiba Sialon type sintered bodies and method of producing the same
US5275986A (en) * 1991-11-25 1994-01-04 Sumitomo Electric Industries, Ltd. Silicon nitride sintered body
US5298470A (en) * 1989-09-22 1994-03-29 The Carborundum Company Silicon carbide bodies having high toughness and fracture resistance and method of making same
US5316856A (en) * 1988-12-03 1994-05-31 Ngk Spark Plug Co., Ltd. Silicon nitride base sintered body
US5370716A (en) * 1992-11-30 1994-12-06 Kennamental Inc. High Z sialon and cutting tools made therefrom and method of using
US5413972A (en) * 1993-12-23 1995-05-09 The Dow Chemical Company SiAlON composites and method of preparing the same
US5459112A (en) * 1994-09-14 1995-10-17 The Carborundum Company Reaction-bonded silicon carbide refractory product
US5521129A (en) * 1994-09-14 1996-05-28 The Carborundum Company Sialon-bonded silicon carbide refractory
US5580510A (en) * 1992-03-06 1996-12-03 The Regents Of The University Of Michigan Method for improving the toughness of silicon carbide-based ceramics
US5618768A (en) * 1995-04-07 1997-04-08 Honda Giken Kogyo Kabushiki Kaisha Sintered body of silicon nitride and composite sintered body of silicon nitride and silicon carbide
WO1998023554A1 (fr) * 1996-11-25 1998-06-04 The Regents Of The University Of Michigan CERAMIQUES A BASE DE SiAlON α RENFORCEES IN SITU
US5785922A (en) * 1994-11-21 1998-07-28 Honda Giken Kogyo Kabushiki Kaisha Method for producing composite sintered body of silicon carbide and silicon nitride
US6124225A (en) * 1998-07-29 2000-09-26 The Regents Of The University Of Michigan Cutting tools and wear resistant articles and material for same
WO2002044104A2 (fr) 2000-11-28 2002-06-06 Kennametal Inc. Ytterbium contenant du sialon et procede de fabrication associe
US20020119017A1 (en) * 2001-02-28 2002-08-29 Gates Alfred S. Oxidation-resistant cutting assembly
US20030134737A1 (en) * 1997-10-20 2003-07-17 Gerhard Wotting Silicon nitride substances containing sintering additives and sio2, method for producing them and use of the same
US20040023035A1 (en) * 2000-07-27 2004-02-05 David Brandon Wear and thermal resistant material produced from super hard particles bound in a matrix of glassceramic electrophoretic deposition
US20040033883A1 (en) * 2000-11-28 2004-02-19 Kennametal Inc. SiA1ON containing ytterbium and method of making
WO2005016847A1 (fr) * 2003-08-07 2005-02-24 Ceramtec Ag Innovative Ceramic Engineering Materiau a base de sialon
US20050189683A1 (en) * 2000-11-28 2005-09-01 Yeckley Russell L. SiAION containing ytterbium and method of making
US20060178256A1 (en) * 2005-02-09 2006-08-10 Yeckley Russell L SiAION ceramic and method of making the same
CN100448799C (zh) * 2003-08-07 2009-01-07 创新陶瓷工程技术公司 SiAlON基材料
US7855159B1 (en) * 2007-01-11 2010-12-21 Kennametal Inc. Alpha-beta SiAlON ballistic ceramic armor
EP2090557A3 (fr) * 2008-02-13 2012-02-01 NGK Insulators, Ltd. Matériau d'oxyde d'yttrium, élément d'un dispositif pour la fabrication de semi-conducteurs, et procédé pour la préparation d'un matériau d'oxyde d'yttrium
US8367576B2 (en) 2010-11-18 2013-02-05 Kennametal Inc. Charge-dispersing alpha prime-beta prime SiA1ON
US20150315088A1 (en) * 2012-12-20 2015-11-05 Xeracarb Limited Sialon bonded silicon carbide material
EP2402098B2 (fr) † 2004-12-22 2021-03-03 Ngk Spark Plug Co., Ltd. Insert en sialon et outil de découpe doté de celui-ci
US20230006373A1 (en) * 2019-11-25 2023-01-05 Continental Teves Ag & Co. Ohg Electronics housing for automated assembly
US11906273B2 (en) 2019-06-13 2024-02-20 Kennametal Inc. Armor plate, armor plate composite and armor
US12247811B2 (en) 2022-01-12 2025-03-11 Kennametal Inc. Armor plate, armor plate composite and armor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19730770C2 (de) * 1996-08-06 2001-05-10 Wacker Chemie Gmbh Porenfreie Sinterkörper auf Basis von Siliciumcarbid, Verfahren zu ihrer Herstellung und ihre Verwendung als Substrate für Festplattenspeicher

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890250A (en) * 1973-03-14 1975-06-17 Norton Co Hot pressed silicon nitride containing finely dispersed silicon carbide or silicon aluminum oxynitride
US3991166A (en) * 1972-01-11 1976-11-09 Joseph Lucas (Industries) Limited Ceramic materials
US4127416A (en) * 1976-07-24 1978-11-28 Lucas Industries Limited Method of producing a ceramic product
US4184882A (en) * 1976-03-25 1980-01-22 Westinghouse Electric Corp. Silicon nitride-silicon carbide composite material
US4547470A (en) * 1983-04-25 1985-10-15 Mitsubishi Kinzoku Kabushiki Kaisha Sialon-base ceramic materials excellent in wear resistance
GB2157282A (en) * 1984-04-06 1985-10-23 Santrade Ltd Nitride-based ceramic material
JPS60246268A (ja) * 1984-05-23 1985-12-05 三菱マテリアル株式会社 サイアロン基セラミツクス
JPS60260471A (ja) * 1984-06-04 1985-12-23 新技術事業団 β―サイアロンを含まないα―サイアロン質焼結体
US4563433A (en) * 1982-02-22 1986-01-07 Kennametal Inc. Ceramic material and method of manufacture
US4594106A (en) * 1983-02-22 1986-06-10 Tateho Kagaku Kogyo Kabushiki Kaisha Spraying materials containing ceramic needle fiber and composite materials spray-coated with such spraying materials
JPS61291463A (ja) * 1985-06-17 1986-12-22 日本特殊陶業株式会社 高靭性セラミツク工具用材料

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991166A (en) * 1972-01-11 1976-11-09 Joseph Lucas (Industries) Limited Ceramic materials
US3890250A (en) * 1973-03-14 1975-06-17 Norton Co Hot pressed silicon nitride containing finely dispersed silicon carbide or silicon aluminum oxynitride
US4184882A (en) * 1976-03-25 1980-01-22 Westinghouse Electric Corp. Silicon nitride-silicon carbide composite material
US4127416A (en) * 1976-07-24 1978-11-28 Lucas Industries Limited Method of producing a ceramic product
US4127416B1 (fr) * 1976-07-24 1984-10-30
US4563433A (en) * 1982-02-22 1986-01-07 Kennametal Inc. Ceramic material and method of manufacture
US4594106A (en) * 1983-02-22 1986-06-10 Tateho Kagaku Kogyo Kabushiki Kaisha Spraying materials containing ceramic needle fiber and composite materials spray-coated with such spraying materials
US4547470A (en) * 1983-04-25 1985-10-15 Mitsubishi Kinzoku Kabushiki Kaisha Sialon-base ceramic materials excellent in wear resistance
GB2157282A (en) * 1984-04-06 1985-10-23 Santrade Ltd Nitride-based ceramic material
JPS60246268A (ja) * 1984-05-23 1985-12-05 三菱マテリアル株式会社 サイアロン基セラミツクス
JPS60260471A (ja) * 1984-06-04 1985-12-23 新技術事業団 β―サイアロンを含まないα―サイアロン質焼結体
JPS61291463A (ja) * 1985-06-17 1986-12-22 日本特殊陶業株式会社 高靭性セラミツク工具用材料

Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987104A (en) * 1986-03-14 1991-01-22 Commonwealth Scientific & Industrial Research Organization Method of forming a ceramic product
US5316856A (en) * 1988-12-03 1994-05-31 Ngk Spark Plug Co., Ltd. Silicon nitride base sintered body
US5196386A (en) * 1989-09-18 1993-03-23 The Tokyo Electric Power Company, Incorporated Sintered ceramic composite body and method of manufacturing same
US5217932A (en) * 1989-09-18 1993-06-08 The Tokyo Electric Power Co., Ltd. Sintered ceramic composite body and method of manufacturing same
US5298470A (en) * 1989-09-22 1994-03-29 The Carborundum Company Silicon carbide bodies having high toughness and fracture resistance and method of making same
US5122485A (en) * 1990-01-29 1992-06-16 Nissan Motor Co., Ltd. Sintered silicon carbide and silicon nitride base composite
US5198165A (en) * 1990-06-19 1993-03-30 Nissan Motor Co., Ltd. Sintered silicon carbide and sialon composite
US5238885A (en) * 1990-09-25 1993-08-24 Kabushiki Kaisha Toshiba Sialon type sintered bodies and method of producing the same
US5275986A (en) * 1991-11-25 1994-01-04 Sumitomo Electric Industries, Ltd. Silicon nitride sintered body
US5580510A (en) * 1992-03-06 1996-12-03 The Regents Of The University Of Michigan Method for improving the toughness of silicon carbide-based ceramics
US5370716A (en) * 1992-11-30 1994-12-06 Kennamental Inc. High Z sialon and cutting tools made therefrom and method of using
US5413972A (en) * 1993-12-23 1995-05-09 The Dow Chemical Company SiAlON composites and method of preparing the same
US5504046A (en) * 1994-09-14 1996-04-02 Kim; Baek H. Process for producing reaction-bonded silicon carbide refractory product
US5563108A (en) * 1994-09-14 1996-10-08 The Carborundum Company Raw batch for producing reaction-bonded silicon carbide refractory product
US5459112A (en) * 1994-09-14 1995-10-17 The Carborundum Company Reaction-bonded silicon carbide refractory product
US5521129A (en) * 1994-09-14 1996-05-28 The Carborundum Company Sialon-bonded silicon carbide refractory
US5785922A (en) * 1994-11-21 1998-07-28 Honda Giken Kogyo Kabushiki Kaisha Method for producing composite sintered body of silicon carbide and silicon nitride
US5618768A (en) * 1995-04-07 1997-04-08 Honda Giken Kogyo Kabushiki Kaisha Sintered body of silicon nitride and composite sintered body of silicon nitride and silicon carbide
US5908798A (en) * 1996-11-25 1999-06-01 The Regents Of The University Of Michigan In-situ toughened alpha prime-sialon-based ceramics
WO1998023554A1 (fr) * 1996-11-25 1998-06-04 The Regents Of The University Of Michigan CERAMIQUES A BASE DE SiAlON α RENFORCEES IN SITU
US6139791A (en) * 1996-11-25 2000-10-31 The Regents Of The University Of Michigan Method of making in-situ toughened alpha prime SiAlon-based ceramics
US7244686B2 (en) * 1997-10-20 2007-07-17 H.C. Starck Ceramics Gmbh & Co. Kg Bearings produced from silicon nitride substances containing sintering additives and SiO2
US20070060466A1 (en) * 1997-10-20 2007-03-15 Gerhard Wotting Bearings produced from silicon nitride substances containing sintering additives and SiO2
US20030134737A1 (en) * 1997-10-20 2003-07-17 Gerhard Wotting Silicon nitride substances containing sintering additives and sio2, method for producing them and use of the same
US6124225A (en) * 1998-07-29 2000-09-26 The Regents Of The University Of Michigan Cutting tools and wear resistant articles and material for same
US20040023035A1 (en) * 2000-07-27 2004-02-05 David Brandon Wear and thermal resistant material produced from super hard particles bound in a matrix of glassceramic electrophoretic deposition
US7037418B2 (en) * 2000-07-27 2006-05-02 Cerel (Ceramic Technologies) Ltd. Wear and thermal resistant material produced from super hard particles bound in a matrix of glassceramic electrophoretic deposition
US20040102305A1 (en) * 2000-11-28 2004-05-27 Kennametal Inc. SiAlON containing ytterbium and method of making
US7049256B2 (en) 2000-11-28 2006-05-23 Kennametal Inc. SiAlON containing ytterbium and method of making
WO2002044104A2 (fr) 2000-11-28 2002-06-06 Kennametal Inc. Ytterbium contenant du sialon et procede de fabrication associe
US20050189683A1 (en) * 2000-11-28 2005-09-01 Yeckley Russell L. SiAION containing ytterbium and method of making
US6964933B2 (en) 2000-11-28 2005-11-15 Kennametal Inc. SiAlON containing ytterbium and method of making
US7094717B2 (en) 2000-11-28 2006-08-22 Kennametal Inc. SiAlON containing ytterbium and method of making
US6693054B1 (en) 2000-11-28 2004-02-17 Kennametal Inc. Method of making SiAlON containing ytterbium
US20040033883A1 (en) * 2000-11-28 2004-02-19 Kennametal Inc. SiA1ON containing ytterbium and method of making
US6988858B2 (en) 2001-02-28 2006-01-24 Kennametal Inc. Oxidation-resistant cutting assembly
US20020119017A1 (en) * 2001-02-28 2002-08-29 Gates Alfred S. Oxidation-resistant cutting assembly
US7514383B2 (en) 2003-08-07 2009-04-07 Ceramtec Ag Materials based on sialon's
US20070010392A1 (en) * 2003-08-07 2007-01-11 Bernd Bitterlich Materials based on sialon's
WO2005016847A1 (fr) * 2003-08-07 2005-02-24 Ceramtec Ag Innovative Ceramic Engineering Materiau a base de sialon
DE102004035364B4 (de) * 2003-08-07 2019-03-14 Ceramtec Gmbh Werkstoff auf der Basis von SiAIONen
CN100448799C (zh) * 2003-08-07 2009-01-07 创新陶瓷工程技术公司 SiAlON基材料
EP2402098B2 (fr) † 2004-12-22 2021-03-03 Ngk Spark Plug Co., Ltd. Insert en sialon et outil de découpe doté de celui-ci
US20060178256A1 (en) * 2005-02-09 2006-08-10 Yeckley Russell L SiAION ceramic and method of making the same
US7309673B2 (en) 2005-02-09 2007-12-18 Kennametal Inc. SiAlON ceramic and method of making the same
EP2511248A2 (fr) 2005-02-09 2012-10-17 Kennametal, Inc. Céramique SiAlON et son procédé de fabrication
US7223709B2 (en) 2005-02-09 2007-05-29 Kennametal Inc. Method of making a SiAION ceramic
US7855159B1 (en) * 2007-01-11 2010-12-21 Kennametal Inc. Alpha-beta SiAlON ballistic ceramic armor
EP2090557A3 (fr) * 2008-02-13 2012-02-01 NGK Insulators, Ltd. Matériau d'oxyde d'yttrium, élément d'un dispositif pour la fabrication de semi-conducteurs, et procédé pour la préparation d'un matériau d'oxyde d'yttrium
US8367576B2 (en) 2010-11-18 2013-02-05 Kennametal Inc. Charge-dispersing alpha prime-beta prime SiA1ON
US9546114B2 (en) * 2012-12-20 2017-01-17 Xeracarb Limited SiAlON bonded silicon carbide material
US20150315088A1 (en) * 2012-12-20 2015-11-05 Xeracarb Limited Sialon bonded silicon carbide material
US11906273B2 (en) 2019-06-13 2024-02-20 Kennametal Inc. Armor plate, armor plate composite and armor
US12259222B2 (en) 2019-06-13 2025-03-25 Kennametal Inc. Armor plate, armor plate composite, and armor
US20230006373A1 (en) * 2019-11-25 2023-01-05 Continental Teves Ag & Co. Ohg Electronics housing for automated assembly
US12567688B2 (en) * 2019-11-25 2026-03-03 Continental Teves Ag & Co. Ohg Electronics housing for automated assembly
US12247811B2 (en) 2022-01-12 2025-03-11 Kennametal Inc. Armor plate, armor plate composite and armor

Also Published As

Publication number Publication date
WO1988009313A1 (fr) 1988-12-01
DE3877566T2 (de) 1996-04-11
DE3877566D1 (de) 1993-02-25
EP0346399B1 (fr) 1993-01-13
EP0346399A1 (fr) 1989-12-20
EP0346399B2 (fr) 1995-08-30
DE346399T1 (de) 1990-05-23
EP0346399A4 (en) 1990-09-05
CA1298321C (fr) 1992-03-31
AU1796688A (en) 1988-12-21

Similar Documents

Publication Publication Date Title
US4826791A (en) Silicon carbide-alpha prime sialon beta prime sialon
US6139791A (en) Method of making in-situ toughened alpha prime SiAlon-based ceramics
EP0589997B1 (fr) Nitrure de silicium fritte a durete et a resistance elevees
US4801564A (en) High-toughness ceramic tool materials
US5411923A (en) Silicon nitride base sintered body
US5439855A (en) Silicon nitride ceramics containing a dispersed pentamolybdenum trisilicide phase
CA1193836A (fr) Methode de fabrication d'articles en matiere ceramique a base d'azoture de silicium avec couche superficielle de composition controlee
EP0035777B1 (fr) Articles résistant à l'abrasion à base de nitrure de silicium
US4425141A (en) Composite ceramic cutting tool
US5023214A (en) Silicon nitride ceramics containing a metal silicide phase
US5424256A (en) Silicon nitride sintered body
EP0347920B1 (fr) Céramiques de TiB2 à haute solidité et ténacité
US5122485A (en) Sintered silicon carbide and silicon nitride base composite
US4433979A (en) Abrasion resistant silicon nitride based articles
EP0310342B1 (fr) Corps composites frittés en SiC-Al2O3 et méthode pour les fabriquer
EP0468486B1 (fr) Matériau céramique, renforcé par de fibres d'alumine courtes et son procédé de fabrication
KR900005511B1 (ko) SiC-Al_2S_3 복합소결체 및 그 제조방법
US4650498A (en) Abrasion resistant silicon nitride based articles
US5250477A (en) Silicon nitride based composite with improved fracture toughness
EP0298936B1 (fr) Matériau céramique composite
EP0255709A2 (fr) Corps céramiques ayant une haute résistance à la rupture
EP0095129B1 (fr) Corps céramique composite pour outil de coupe et son procédé de fabrication
EP0491273A2 (fr) Nitrure de silicium fritté
EP0317147B1 (fr) Corps composites frittés en Si3N4-Al2o3 et leur méthode de production
US5173459A (en) Si3 N4 -A12 O3 composite sintered bodies and method of producing the same

Legal Events

Date Code Title Description
AS Assignment

Owner name: KENNAMETAL INC., P.O. BOX 231, LATROBE, PA. 15650,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MEHROTRA, PANKAJ K.;REEL/FRAME:004752/0681

Effective date: 19870528

Owner name: KENNAMETAL INC., P.O. BOX 231, LATROBE, PA. 15650,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SWIOKLA, JOYCE L.;REEL/FRAME:004752/0683

Effective date: 19870528

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12

AS Assignment

Owner name: KENNAMETAL PC INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KENNAMETAL INC.;REEL/FRAME:011052/0001

Effective date: 20001023